工程陶瓷引弧微爆炸加工冲击力建模及实验分析

Model building and experimental analysis on impact force of micro-detonation machining of striking arc for engineering ceramics

介绍了引弧微爆炸加工过程中冲击力产生的原因,利用单因素实验确定影响冲击力的主要工艺参数,利用正交实验和回归分析的方法建立了冲击力指数型经验模型,得出工艺参数对冲击力的影响规律。实验结果表明:工作电流、工作气压和微爆炸发生器喷嘴直径是影响冲击力大小的主要工艺参数,冲击力随着工作电流的增大而减小,随着工作气压和喷嘴直径的增大而增大,而工作脉宽和工作距离对冲击力大小影响不显著;建立的冲击力模型与实验结果吻合良好。研究结果可以为引弧微爆炸加工过程的控制提供参考依据。

The generation cause of impact force during the micro-detonation machining process was in- troduced. The main processing parameters were confirmed by means of single-factor experiments. Based on above parameters, an exponential-type empirical model for impact force was built by emplo- ying the orthogonal experiments and the regression analysis. And the influences of the processing parameters on impact force were analyzed. Investigated results display that： the working current and the working pressure as well as the nozzle diameter of the micro-detonation generator are the main pro- cessing parameters to determine the impact force magnitude. The impact force decreases with an in- crease in the working current and it increases with increases in the working pressure and the nozzle diameter. On the other hand, the working pulse width and the working distance have insignificant influences on the impact force magnitude. And the impact force model is consistent with the experimental results. So the research can offer an important reference for the process control of micro-detonation machining with striking arc.